Sawmill set-works.



Patented Nov. 25, I QDZ.

- J WALTDN 'sAwMlLL SET wonKs. (Appl cat on led Feb 28 1901 Y un. 7|4,269. Patented mw. 25, |902.

I.1. wALTON. SAWMILL SET WORKS.

(Appucatiop med Feb.2s,19o1.) (No Model.) 3 Sheets-Sheet 2.

ATTORNEY Patented Nov. 25, |902.`

No. 7|4,2 69. l

` J. WALTON'.

SAWMILL SET WDHKS.

A{Appcazion ed Feb, 28, 1901.) (no uqam s sheets-snm s.

WITNESSES: L .I VENTR @5%. N j@ m ATTORNEY me cams v'srsnspn., Powumm wAsHmaTon, ny c,

UNITED STATES ATnNT Finca.

JOHN WALTON, OF MILWAUKEE, 'WISOONSIIQ ASSIGNOR, BY MESNE ASSIGN- MENTS, OF ONE-HALF TO ALLIS-OHALMERS COMPANY, A CORPORATION OF `NEW' JERSEY.

SAWMILLL SET-WORKS.

SPECIFICATION forming part of Letterslatent No. 714,269, dated November 25, 1902.

Application filed February 23,` 1901. Serial No. 48,481. (No model.)

g and it consists in certain improvements in the construction thereof, as will be hereinafter fully described, and pointed out in the claims.

The invention is illustrated in the accompanying drawings as follows:

Figure l shows a section of the device on the line 1 1 in Fig. 2. Fig. 2 shows a plan view of the device; Fig. 3, an elevation looking from the right of Fig. l; Fig. 4, a section of a fragment of the device, showing an enlargedview of the port and of the cylinder construction.

A marks the carriage-frame; B, the carriage-wheels, which are mounted on the axle B'; O, the blocks, on which is placed a log X, and D the knee. The knee is provided with the usual rack, and this is meshed by a pinion, (these parts not shown.) The pinion is fixed on the set-shaft E, and this shaft is journaled in the boxes f in the base-plate F of the set-works. Mounted on the set-shaft E is a ratchet-wheel G. Rock-arms H are `journaled at eachside of the ratchet-wheel G on the shaft E, and each carry ratchet- Links I-I' I-I' connect the rock-arms H with an oscillating disk I', said links being connected to the disk at each side of its center. The disk Il is mounted on the shaft I. The shaft I is journaled in the boxf, mounted on the base F. Extending from the base F is a frame J, with which the cylinder K is preferably integrally cast. A steam-chest L,

with the ports leading from it to the cylinder,

is also preferablyarranged in this saine casting. A piston-section M is fitted in the cylinder Kand has'extending from it the pistonrod N.` Arack N is .secured to the end of thepiston-rod and operates inthe guide f2 in the base-plate F. The rack meshes a gear I2, which is fixed on the shaft I. The pistonthe piston.

section M is hollow and is closed only at its bottom end. The interior of the section is screw-threaded, and into this is screwed a piston-section M', which is provided with an external screw-thread for this purpose.

A rod O extends through an opening m2 in the upper end of the section M' and is provided with the spline 0, which is arranged to move in a groove (not shown) in the section M', so as to lock the rod O against rotative movement in the opening m2. The rod O, however, forms a sliding fit, which permits a reciprocation of the piston on it, and preferably forms a steam-tight joint in the opening m2. Extending .from the rod O is a reduced portion O', which passes through a stuffing-box k'. This stuffing-box is mounted on the cylinder-head. The shoulder 0,formed between the rod O and the extension O', rests against the cylinder-head M2 and prevents an upward movement of the rod O. Keyed to the upper end of the extension Ois the crankarm P, and extending upwardly from this is the crank-pin P'. The pin P' is sleeve-shaped,

and in the opening is a set-pin p. Extending from the set-pin is a stern p' of smaller diameter than the set-pin. The upper end of thestem P is provided with an inwardlyprojecting shoulder p2, and a spring p4 is tensioned against the shoulder formed by the projection p2 and the shoulder p3. The upper end of the extension passes through a knob p5 and is secured in place by a nut p6. The knob has the sleeve portion p7, which telescopes the pin P', and thus forms a guide for the knob. The cylinder is provided with a iiange 7a2, in the outer edge of which are perforations k3, arranged to come into regis- -ter with the set-pin p as the arm is turned.

y On the face of the flange 702 are arranged iigures which indicate the adjustment of the piston with the set-pin in the different holes. It Willreadily be seen that by turning the crank P the piston-section M is turned and is screwed into or out of the section M, so as to lengthen or shorten the piston. The effect of thus lengthening or shortening the piston is to lengthen or shorten the stroke of The faces of the piston form stops which are carried by the piston. y These contact with the cylinder-head. The section IOO M is preferably provided with the piston-ring m and the section M With the section m', so as to make the piston practically steam-tight so far as the intermediate portions are concerned. lf, however, steam should leak through the opening m2, a jet-opening 'mLl is provided which comes opposite an exhaustport with each stroke of the piston and allows a discharge of the water or steam from the interior of the piston. The valve mechanism is as follows: The steam-chestis preferably cylindrical and has a rock-valve R arranged in it. Secured to the valve is a handle R', by which it may be operated. The valve is of the ordinary D -shape. Steam enters by the pipe Q and port Z to the body of the steam-chest. As the valve is turned it is allowed to pass through the ports Z on either side as the valve is moved. The port Z/ extends to the extreme end of the cylinder and so operates upon the piston when it is resting against the cylinder-head. A second port Z2, which may be termed the exhaustport, enters the valve -chest between the ports Z and the exhaust-passage Z2. The exhaust-passage connects with the exhaust-pipe S. Arranged between the ports Z' and Z2 are the puppet-valves Z6. These are provided with a stem Z8, which extends through a stuing-box Z7. At the outer end of the stem is an adjusting-nut Z9, and between the stuffingbox and this adjusting-nut is a spring Zw. By adjusting the spring any pressure lnay be given to the valve desired. Extending into the exhaust-port Z2 are the valve-plugs Z5, the purpose of which is to reduce the capacity of the ports to any point desired. The operation of this mechanism is as follows: The operator grasps the handle R' and turns the valve, so as to permit steam to enter one end of the cylinder, (with the parts in the position shown to enter the bottom cylinder.) This brings the exhaust-port r of the valve in a position to connect the exhaust-passage Z3 and the exhaust-port Z2 at the opposite end of the cylinder. The plug-valve Z5 prevents a rapid exhaust movement of steam and regulates the speed of this movement of the piston. After the piston passes the opening of the port Z2 the steam in the end of the cylinder is confined and forms a cushion, the tension of which is adjusted by the pressure exerted upon the valve Z6. When this tension is reached, the valve Z6 is opened by the pressure and the steam or iiuid allowed to exhaust through the passage Z2. By reversing the lever R the operation is the same at the opposite end of the cylinder. It will be seen that with this device the speed is controlled at the initial movement of the piston by the valve Z5 and that it may be cushioned and slowed down to any speed desired at the end of the stroke by the tension of the valve ZG, and this prevents the ratchet mechanism from carrying by. The effect on the ratchetwheel is to move it forward with the movement of the piston in both directions. The

adjustment of the piston is shown on the flange by the figures on the ange and can be made so as to give any movement to the log desired, so as to permit of a cut of any thickness. The adjustment can be made so as to require a movement in both directions of the piston, or the adjustment can be made so that the desired movement of the log may be accomplished by a movement of the piston in one direction.

l. In a sawmill set-works, the combination with the log-moving mechanism; of a cylinder; a piston arranged in said cylinder; connecting means between said piston and said logmoving mechanism, whereby said logmoving mechanism may be actuated by said piston; and means for varying the length of said piston to vary its stroke.

2. In a sawmill set-works, the combination with the log-moving mechanism; of a cylinder; a piston arranged to operate in said cylinder; means for varying the length of said piston to vary its stroke; connecting means between said piston and log-moving mechanism whereby said piston actuates said logmoving mechanism; and a cushion device for regulating the speed of the piston.

3. In a sawmill set-works, the combination with the log-moving mechanism; of a cylinder; a piston arranged to operate in said cylinder; means for varying the length of said piston to vary its stroke; connecting means between said piston and log-moving mechanism Whereby said piston actuates said logmoving mechanism; and a cushion device arranged to be brought into action only at the ends of the stroke for cushioning the parts and regulating the speed of the piston at the end of the stroke.

4. In a sawmill set-Works, the combination with the log-moving mechanism; of a cylinder; a piston arranged in said cylinder, said piston being formed of screw-sections, one section being arranged to screwinto the other; a connectionbetween said piston and logmovin g mechanism; and means for positively locking the sections in a position to which they may be adjusted.

5. In a sawmill set-Works, the combination with the log-moving mechanism; of a cylinder; a piston arranged in said cylinder, said piston being formed of screw-sections, one section being arranged to screwinto the other; a connection between said piston and logmoving mechanism; and means for actuating one section relatively to the other from without the cylinder and for positively locking the'sections in their adjusted positions.

6. In a sawmill set-works, the combination with the log-moving mechanism; of a cylinder a piston arranged in said cylinder, said piston being formedof screw-sections, one section being arranged to screw into the other; a connection between said piston and logmoving mechanism; a rod secured to one of said sections and extending Without the cyl- IOO IIO

locking the crank indifferent positions to positively lock the piston in different adjustments.

7. In a sawmill set-Works, the combination withthe log-moving mechanism; of a cylinder; a piston arranged in said cylinder, said piston comprising two sections, one of said sections being arranged to screw into the other to vary the length of the piston; a rod eX- tending from one of said sections; an arm onA `a spline-and-groove connection; the extension, O', passing through a stung-box; said stuffing-box; the arm, P; the spring-actuating pin, on the arm, P; and the flange, k2,

\ n having the holes, 7a2, arranged to permit the chamber and to open said passage when acpimp, to bebrought into register therewith.

9.` `In a sawmill set-works, the combination with the ratchet-wheel, G; a ratchet-arm, H, arranged to operate upon said ratchet; the link, H'; the oscillating disk, I'; the shaft, I, upon which the disk, I', is mounted the gear, I2, fixed on said shaft; the rack, N', arranged to mesh said gear; the piston-rod, N, connected with said rack; the piston comprising the sections, M, and M', secured to the pisi ton-rod, one of the sections being adapted to 4o be screwed into the other; the rod, O, arranged to slide in the section, M', with a spline-and-groove mechanism; the extension, O', thereon; the arm, P; on the extension,

0'; the set-pin, p, carriedl by the arm, P; the

flange, k2, having the opening, kg, in position to permit the set-pin, p, to be brought into register therewith.

l0. `Ina sawmill set-works, the combination with the log-moving mechanism; an engine for actuating said mechanism, comprising a Workin g piston; a cushioning device arranged i to operate only at the end of the stroke, said i cushioning device comprising a plunger and tnated; and means for varying the stroke of the piston.

11. In a sawmill set-works, the combination with the` log-moving mechanism; an engine for actuating said mechanism, comprising a cylinder and a working piston therein; a controlling-valve; two ports leading from said valve to the end ofthe cylinder, one entering the cylinder at a distance from the end thereof and the other approximately at the end of the cylinder; and a valve adapted to be opened by a predeterminedipressure in the port leading from the end of the cylinder.

12. In asawmill set-works, the combination with the log-moving mechanism; an" engine for actuating said` mechanism, comprising a cylinder and a working piston therein; a controlling-valve; two ports leading from said valve to the end of the cylinder, one entering the cylinder` at a distance from the end thereof and the other approximately at the end of the cylinder; a pressure-actuated valve for the port leading from the end of the cylinder, and arranged to be actuated by a predetermined pressure in the port; and means for adjusting the valve to act at dilerent pressures.

13. In a sawmill set-works, the combination with the log-moving mechanism; an engine for actuating said mechanism, comprising a cylinder and a working piston; a steam-chest,

L'; the valve, R, therein; the ports, Z' and Z2, leading therefrom, the port, Z', leading to the end of the cylinder and the port, Z2, leading to a point in the cylinder at some distance from the end; a passage `between the ports Z' Z2; the valve, Z6, controlling the movement of steam through said passage; means for varying the seating pressure on the valve; and the valve, Z5, in the port, Z2.

14. In asawmillset-works, the combination with the log-moving mechanism; of an engine for actuating said mechanism comprising a cylinder and a working piston, said pistonA being arranged to be lengthened or shortened to vary the stroke of the piston; a steamchest, L; the valve, R, therein; theports, Z', Z2; leading therefrom, the port, Z', leading to `the end of the cylinder and the port, Z2, leading to a point in the cylinder at some distance from the end a passage between the ports Z' Z2; the valve, Z6, controlling the movementof steam through said passage; means for varying the seating pressure on the valve; and the valve, Z5, in the port, Z2.

In testimony whereof I affix my signature in presence of two witnesses.

JOHN WALTON. 2

Witnesses:

E. I-I. LURZANDEN, B. A. IfZRENNAN.`

IOO 

